Here is the full list of all 49 Metro: Last Light Redux achievements worth 1,000 gamerscore.
Found out about the Reds' plans.
Completed the BRIDGE level without a kill.
Disarmed 10 Traps.
Killed the Rhino.
Burned 50 Cobwebs.
Killed 100 Mutants.
Spent 30 minutes' worth of Filters.
Found and returned the crying child's Teddy Bear.
Rescued the Women and Children on the BANDITS level without raising alarm.
Turned off 40 Lights without breaking them.
Killed the Watchmen attacking the Railcar without taking any damage.
Made 10 Spiders flip belly-up.
Completed the REVOLUTION level without killing and raising an alarm.
Used 10 Lever Switches.
Escaped from the Red Line.
Watched the entire Theater Show.
Completed the FACILITY level without killing or raising alarm.
Completed the SEPARATION level without killing or raising alarm.
Escaped the chasing Nazis on the REICH level without being caught once.
Freed the Prisoners.
Finished the ASHES level without taking a hit.
Completed training sequence.
See all Visions in the Dead City.
Destroy D6.
Kill all armed enemies on the REVOLUTION level, including all reinforcements.
Save the Bear from the Watchmen after the fight.
Drink at every occasion.
Complete the ECHOES level undetected by the Watchmen.
Kill 10 enemies in a row with Throwing Knives.
Complete all 43 of Artyom's hidden Diary pages.
Save D6.
Kill Pavel.
Remove your mask when Lesnitsky demands it.
Stealthily kill 15 Enemies.
Kill 100 Human Enemies.
Choose three primary weapons that use different ammo.
Complete the game in Survival Mode.
Complete the game in Spartan Mode.
Open 10 locked safe boxes.
Complete the SNIPER TEAM level.
Complete the KSHATRIYA level.
Complete the HEAVY SQUAD level.
Complete the TOWER level.
Complete the SPIDER LAIR level.
Spend 1 hour on the DEVELOPER level.
Complete the PAVEL level.
Complete the KHAN level.
Complete the ANNA level.
Make Moskvin tell the truth with help from the Dark One.